hoffa was last seen july 30, 1975 outside a suburban detroit restaurant. he was on his way to a meeting with another teamster official and mobster boss. there was speculation he was buried under the old giants stadium in new jersey or thrown into a florida swamp. >> tough decision when should older drivers stop driving. a new study say doctors can play a significant role. researchers found when doctors tell patients they may not be fit to drive or when they tell the dmv there's a drop in serious crash injuries. most of the patients in the study were more than 60 years old. it's unclear if those patients drove less or just more carefully. in the u.s. it's estimated 600,000 older drivers hand over their keys every year. >>> a group in switzerland plans to unveil a portrait today claiming it is an earlier version of the mona lisa painted by leonardo da vinci. "isleworth mona lisa," similar to the one hanging in the louvre, it's 11 or 12 years older than the real thing. >>> and this morning scientists are taking stock of the oceans and finding amazing things.